Add OSVDB-93754: Synactis PDF In-The-Box ConnectToSynactic Stack Buffer Overflow

This module exploits a vulnerability found in Synactis' PDF In-The-Box ActiveX
component, specifically PDF_IN_1.ocx.  When a long string of data is given
to the ConnectToSynactis function, which is meant to be used for the ldCmdLine
argument of a WinExec call, a strcpy routine can end up overwriting a TRegistry
class pointer saved on the stack, and results in arbitrary code execution under the
context of the user.